What is high quality?

First: the authenticity of the list needs to be considered. The main problem affecting the authenticity of the number is time, that is, after a long time, the owner changes the number, the number code is recovered, and the recovery is reactivated, resulting in the number changing owner. Therefore, the list must be newly collected to avoid changing the number. Holding an authentic list is no different from dialing it indiscriminately.

Second: you need to consider the connection rate of the list. The connection rate mentioned here does not refer to the proportion of empty numbers. Since it is a newly collected number, the empty number has been excluded. What are the factors that affect the connection rate? The connection rate of the number mainly depends on the nature of the number, such as whether it is a work mobile phone or a private mobile phone. People with private mobile phones often don't like to answer strange calls, or even set interception directly. Even if the interception is not set, the housekeeping software will prompt them to sell the phone, and others will hang up and refuse to answer. Most people use old-fashioned stone mobile phones for work, and there will be no disturbing tips.

Third: the directionality of the list needs to be considered. Directionality is to designate people, powerful people and people in need, and give you a lot of student numbers, old people numbers and farmers numbers to sell loan services. That's just casting pearls before swine.